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New, environmentally friendly, rare earth carboxylate corrosion inhibitors for mild steel
journal contribution
posted on 2018-07-15, 00:00 authored by Anthony SomersAnthony Somers, Bruce HintonBruce Hinton, C de Bruin-Dickason, G B Deacon, P C Junk, Maria ForsythMaria ForsythFour recently synthesized rare earth 3-(4-methylbenzoyl)propanoate (mbp) compounds (RE = La, Ce, Nd and Y) were evaluated as corrosion inhibitors for mild steel in 0.01 M NaCl. At a concentration of 0.25 mM all the compounds showed some level of inhibition after 30 min immersion, with the Y(mbp)3complex giving the largest reduction in corrosion current density, from 1.92 μA/cm2for the control sample to 0.25 μA/cm2for the Y based inhibitor. All the RE(mbp)3inhibitors acted predominantly as anodic inhibitors, showing little effect on the cathodic reaction after 30 min. Surface analysis after 6 h immersion using FTIR and EDS detected the presence of a thin film containing inhibitor components on all surfaces, thus accounting for the reduced corrosion rate, with the Y(mbp)3compound having the most significant effect on corrosion and showing the most uniform surface coverage.
History
Journal
Corrosion scienceVolume
139Pagination
430 - 437Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0010-938XLanguage
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, Elsevier Ltd.Usage metrics
Keywords
Mild steelRare earth carboxylateCorrosion inhibitionIR spectroscopyPotentiostatic polarizationScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials ScienceAS1020 STEELCINNAMATEMITIGATIONSALICYLATEMECHANISMSURFACESCERIUMMODEIRONMechanical Engineering
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